我正在尝试将已经编写在ROS中的代码与一些基本的Visp行集成,以便使用Visp函数显示相机源。我是visp的初学者,因此我正在尝试一些基本的东西。我在这里附上相关的代码行
//Lots of lines of code above and blow this code block
cv::Mat src_gray;
cv::cvtColor(imageLeft, src_gray, CV_RGB2GRAY );//imageLeft is a colour image got from the camera through another node
vpImage<unsigned char> I;
vpImageConvert::convert(src_gray,I) ;
vpDisplayOpenCV display;
if(this->lt == false)//this if loop is to prevent from infinite windows coming out
{display.init(I, 100, 100, "Line tracking");
this->lt = true;}
vpDisplay::display(I);
vpDisplay::flush(I);
让我确保这段代码在回调中,因此它等同于infinte while循环,除非进程停止。
我无法在窗口中获取相机输出。当我运行节点时,窗口打开但没有图像。任何想法?
答案 0 :(得分:1)
ViSP-ROS干扰最近发生了变化。虽然ViSP Bridge提供ROS和ViSP之间的低级接口,但Visp ROS是更好和更高级别的接口。从那里,您可以访问此tutorial,其中修改了常规ViSP代码以使用ROS。
ViSP代码与您的代码类似:
#include <visp/vp1394TwoGrabber.h>
#include <visp/vpDisplayX.h>
#include <visp/vpImage.h>
int main()
{
#ifdef VISP_HAVE_DC1394_2
try {
vpImage<unsigned char> I; // Create a gray level image container
bool reset = true; // Enable bus reset during construction (default)
vp1394TwoGrabber g(reset); // Create a grabber based on libdc1394-2.x third party lib
g.setVideoMode(vp1394TwoGrabber::vpVIDEO_MODE_640x480_MONO8);
g.setFramerate(vp1394TwoGrabber::vpFRAMERATE_60);
g.open(I);
std::cout << "Image size: " << I.getWidth() << " " << I.getHeight() << std::endl;
#ifdef VISP_HAVE_X11
vpDisplayX d(I);
#else
std::cout << "No image viewer is available..." << std::endl;
#endif
while(1) {
g.acquire(I);
vpDisplay::display(I);
vpDisplay::flush(I);
if (vpDisplay::getClick(I, false))
break;
}
}
catch(vpException e) {
std::cout << "Catch an exception: " << e << std::endl;
}
#endif
}
支持ROS的代码:
#include <visp/vpDisplayX.h>
#include <visp/vpImage.h>
#include <visp_ros/vpROSGrabber.h>
int main()
{
try {
//vpImage<unsigned char> I; // Create a gray level image container
vpImage<vpRGBa> I; // Create a color image container
vpROSGrabber g; // Create a grabber based on ROS
g.setCameraInfoTopic("/camera/camera_info");
g.setImageTopic("/camera/image_raw");
g.setRectify(true);
g.open(I);
std::cout << "Image size: " << I.getWidth() << " " << I.getHeight() << std::endl;
#ifdef VISP_HAVE_X11
vpDisplayX d(I);
#else
std::cout << "No image viewer is available..." << std::endl;
#endif
while(1) {
g.acquire(I);
vpDisplay::display(I);
vpDisplay::flush(I);
if (vpDisplay::getClick(I, false))
break;
}
}
catch(vpException e) {
std::cout << "Catch an exception: " << e << std::endl;
}
}
希望这有帮助!